<template>
  <div>
    <h3>我是父组件</h3>
    <p>我是父组件中的num: {{ num }}-----{{ num2 }}</p>
    <hr>
    <!-- <Son
      :aa="num"
      :bb="num2"
      @update:aa="val =>num=val"
      @update:bb="val => num2=val"
    /> -->
    <Son :aa.sync="num" :bb.sync="num2" />
  </div>
</template>

<script>
import Son from './Son.vue'
export default {
  components: { Son },
  data() {
    return {
      num: 100,
      num2: 200
    }
  }

}
</script>

<style>

</style>
